package com.example.springootmybatiscrud1.mapper;

import com.example.springootmybatiscrud1.pojo.Emp;
import org.apache.ibatis.annotations.*;

import java.time.LocalDate;
import java.util.List;

@Mapper
public interface EmpMapper {
    //根据id删除数据
    @Delete("delete from emp where id = #{id}")
    public void delete (Integer id);
    //public int delete (Integer id);
    @Options(useGeneratedKeys = true,keyProperty = "id")
    @Insert("insert into emp(username,name,gender,image,job,entrydate,dept_id,create_time,update_time)"+
            " values (#{username},#{name},#{gender},#{image},#{job},#{entrydate},#{deptId},#{createTime},#{updateTime})")
    public void insert (Emp emp);

    @Update("update emp set username=#{username},name=#{name},gender=#{gender},image=#{image}," +
            "job=#{job},entrydate=#{entrydate},dept_id=#{deptId},update_time=#{updateTime} where id = #{id}")
    public void update(Emp emp);

    //方案三:开启mybatis的驼峰命名自动映射开关---a_column----->aColumn
    //根据id查询员工
    @Select("select * from emp where id = #{id}")
    public Emp getById(Integer id);

    //方案一:给字段起别名，让别名与实体类属性一致
//    @Select("select id,username,password,name,gender,image,job,entrydate,"+
//            "dept_id deptId,create_time createTime,update_time updateTime from emp where id=#{id}")
//    public Emp getById(Integer id);

    //方案二:通过@Results,@Result注解手动映射装表

//    @Results({
//            @Result(column="dept_id",property="deptId"),
//            @Result(column="create_time",property="createTime"),
//            @Result(column="update_time",property="updateTime")
//    })
//    @Select("select * from emp where id = #{id}")
//    public Emp getById(Integer id);

    //条件查询员工
    //方案一
//    @Select("select * from emp where name like '%${name}%' and gender=#{gender}"+
//            " and entrydate between #{begin} and #{end} order by update_time desc")
//    public List<Emp> list(@Param("name")String  name,@Param("gender") Short gender,@Param("begin") LocalDate begin,@Param("end") LocalDate end);

    //方案二
//    @Select("select * from emp where name like concat('%',#{name},'%') and gender=#{gender}"+
//            " and entrydate between #{begin} and #{end} order by update_time desc")
//    public List<Emp> list(@Param("name")String  name,@Param("gender") Short gender,@Param("begin") LocalDate begin,@Param("end") LocalDate end);

    List<Emp> findAll();

    //动态条件查询
    public List<Emp> list(@Param("name")String  name,@Param("gender") Short gender,@Param("begin") LocalDate begin,@Param("end") LocalDate end);

    //动态更新
    public void update2(Emp emp);

    //批量删除
    public void deleteByIds(@Param("ids")List<Integer> ids);
}
